There are two types of VAWT, drag type and lift type. Drag type starts up in the low wind velocity condition, but peripheral velocity does not exceed the wind velocity. As for the lift type, peripheral velocity can exceed the wind velocity, but it does not start up in the low wind velocity condition. A new blade cross section, Magatama, has been proposed. This Magatama section may have both advantages of drag and lift type. The rotary torque was calculated by 2D unsteady numerical simulation. In this simulation the rotor that has three Magatama blads rotates. The parameters are wind velocity, rotation speed, and blade setting angle. Results obtained by this numerical simulation are as follows. The blade setting angle decreases with the rotary torque increases. There is a limit rotation speed to rotate. If the rotation speed exceeds this limit the rotor generates negative torque which is unrealistic.